diff --git a/test/picosha2.h b/3rdParty/PicoSHA2/picosha2.h
similarity index 100%
rename from test/picosha2.h
rename to 3rdParty/PicoSHA2/picosha2.h
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 384646554..d94ca9579 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -587,6 +587,7 @@ if(RUN_TESTS)
   target_include_directories(devilutionx-tests PRIVATE ${GTEST_INCLUDE_DIRS})
   target_link_libraries(devilutionx-tests PRIVATE libdevilutionx)
   target_link_libraries(devilutionx-tests PRIVATE ${GTEST_LIBRARIES})
+  target_include_directories(devilutionx-tests PRIVATE 3rdParty/PicoSHA2)
   if(ENABLE_CODECOVERAGE)
     if(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
       message(WARNING "Codecoverage not supported with MSVC")